Effects of host,temperature and relative humidity on competitive displacement of two invasive Bemisia tabaci biotypes [Q and B] |
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| Authors: | Dong Chu Yun‐Li Tao You‐Jun Zhang Fang‐Hao Wan Judith K Brown |
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| Affiliation: | 1. High‐tech Research Center, Shandong Academy of Agricultural Sciences;2. Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences;3. State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China;4. School of Plant Sciences, The University of Arizona, Tucson, USA |
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| Abstract: | Abstract Bemisia tabaci shifted unexpectedly in China from a predominance of B biotype to Q biotype during 2005–2008. This observation stimulated an interest in investigating whether environmental factors, including host, temperature and relative humidity (RH) could possibly explain the observed shift in biotypes distribution. Results indicated that all three parameters examined influenced biotype survivability. The percentage of B biotype, when reared together on pepper plants with the Q biotype, decreased significantly from 66.7% in the founder population, to 13.6% and 3.7% in the first and second generations, respectively. When the B (founder at 66.7%) and Q (founder at 33.3%) biotypes were reared together on eggplant alone, or on pepper‐plus‐eggplant combination, the population size of the B biotype either remained constant, or increased somewhat in the first and second generations. On eggplant, the effects of RH and temperature on the competitiveness between the Q and B biotypes (3 pairs of Q and 6 pairs of B) were not significant. |
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| Keywords: | Bemisia tabaci B biotype Q biotype biological invasion host plant non‐competitive displacement |
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